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Summary of Contents for Ingersoll-Rand CENTAC
- Page 1 CENTAC ® CMC Technical Reference Manual INGERSOLL-RAND ® AIR COMPRESSORS...
- Page 2 WARRANTIES WHATSOEVER. Printing Date: 18 October, 1999 Ingersoll-Rand air compressors are not designed, intended, or approved for breathing air applications. Ingersoll-Rand does not approve specialized equipment for breathing air applications and assumes no responsibility or liability for compressors used for breathing air service.
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Page 3: Table Of Contents
Digital Inputs _______________________________________________________________________ 16 Digital Outputs ______________________________________________________________________ 16 Compressor Operating Methodology ____________________________________ 17 Stopped __________________________________________________________________17 Waiting ____________________________________________________________________________ 17 Not Ready _________________________________________________________________________ 17 Ready _____________________________________________________________________________ 17 Rotating __________________________________________________________________17 Starting____________________________________________________________________________ 17 Unloaded __________________________________________________________________________ 18 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... - Page 4 Reload Percent _____________________________________________________________________ 41 Setting the Start Time ______________________________________________________42 Setting the CT Ratio________________________________________________________42 Inlet Unload Position _______________________________________________________42 Setting Set Point Ramp Rate_________________________________________________43 Alarm and Trip Settings _____________________________________________________43 Troubleshooting_____________________________________________________ 44 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999...
- Page 5 BCM Problems______________________________________________________________________ 71 BCM is not controlling____________________________________________________________ 71 OUI Problems_______________________________________________________________________ 71 OUI is dim _____________________________________________________________________ 71 OUI is black____________________________________________________________________ 71 OUI displays “INGERSOLL-RAND Centrifugal Compressor Division”_______________________ 71 UCM Problems______________________________________________________________________ 71 All UCM LED’s are not lit _________________________________________________________ 71 Options ____________________________________________________________ 72 Enclosures________________________________________________________________72...
- Page 6 Settings Folder ___________________________________________________________________ 79 General Sequence of Operation ________________________________________________________ 80 Starting Methodology ______________________________________________________________ 80 Diesel Driven Compressors _________________________________________________83 Communication _____________________________________________________ 84 Centac Energy Master (CEM) ________________________________________________84 Direct CMC Communications with RS422/485___________________________________84 The CMC-MODBUS Interface ________________________________________________85 Introduction_________________________________________________________________________ 85 Serial Modes _______________________________________________________________________ 85 1X36003 Version 2.52...
- Page 7 Status (STS) Byte - Status Error Code _______________________________________________ 108 Transaction (TNS) Bytes ___________________________________________________________ 108 BCC (Block Check Character) and CRC (Cyclic Redundancy Check)_______________________ 108 BCC (One Byte) _______________________________________________________________ 109 CRC (Two Bytes)_______________________________________________________________ 109 Data Addressing ___________________________________________________________________ 110 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999...
- Page 8 System Information _________________________________________________ 135 Status Codes_____________________________________________________________135 Base Control Module (BCM)________________________________________________137 Module Layout _____________________________________________________________________ 137 Connector Description _______________________________________________________________ 138 Connector Input and Output (I/O) ______________________________________________________ 139 Operator User Interface Module (OUI) _______________________________________140 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999...
- Page 9 RS422 Network Wiring Diagram - Half Duplex ____________________________________________ 148 Terminating Resistor ________________________________________________________________ 149 Typical System Layout ______________________________________________________________ 149 Network Diagram ___________________________________________________________________ 150 Technical Specification ______________________________________________ 151 Glossary ____________________________________________________________ 1 Service Tool Variable Names ___________________________________________ 7 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999...
- Page 10 Figure 9: Changes in Discharge Pressure .................... 11 Figure 10: Changes in Discharge Pressure ..................12 Figure 11: Plant Air System ....................... 35 Figure 12: Troubleshooting Tree ......................44 Figure 13: MODBUS Messages ......................85 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999...
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Page 11: What's New In This Manual
Bypass Valve Pressure PID control loops have been added to the OUI, this feature provides a higher level of tuning capabilities for the knowledgeable User. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 12: References
Deshpande, Pradeep B. and Ash, Raymond H., Computer Process Control With Advanced Control Applications, 2nd Edition, Instrument Society of America, 1988 CENTAC ENERGY MASTER, Version CEM230, Ingersoll-Rand Company, March 1992 White, M.H., Surge Control for Centrifugal Compressors, Chemical Engineering, December 25, 1972 Hall, James W., THERMODYNAMICS OF COMPRESSION: A Review of Fundamentals,... -
Page 13: General - Cmc Panel
NOTE For the purpose of consistency and clarity, all of the descriptions and examples that follow refer to "air" for the more generic "gas". Any gas compressed by a Centac or X- FLO compressor would also apply. 1X36003 Version 2.52 ©... -
Page 14: Control Methodology
Constant Pressure Control - Modulate Constant pressure control is a frequently required performance control method for Centac air compressors. If left uncontrolled, the compressor's discharge pressure would rise and fall along the natural performance curve as system demand changed. Modulate control satisfies the constant pressure requirement. -
Page 15: Energy Saving Control - Autodual
Unload Design Point discharge pressure is required. Point Reload Point Modulate is the most commonly (Reload Percent) used control method for Centac Discharge Pressure and X-FLO compressors. Energy Saving Control - Autodual Unloaded Autodual automatically loads the Bypass Inlet... -
Page 16: How Does Constant Pressure Modulation Work
CMC will send a 4-20 mA signal to "Modulate", open or close, the inlet and/or bypass valve to maintain the specified system pressure set point. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 17: Proportional Band
Figure 5: Proportional Band, Pb and directly related to valve cycling, therefore, as It decreases, valve life increases and cycling decreases. For the CMC controlling Centac and X-FLO compressors, It values are typically less than 1.00. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company... -
Page 18: Motor Current, Minload And Maxload
MaxLoad or High Load Capacity - Mass Flow Limit (HLL). The second function determines the point at which the Figure 7: MinLoad and MaxLoad bypass valve begins to modulate for 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 19: 1X36003 Version 2.52
Plant Air System, and the remainder is blown off. Even though the Plant Air System receives only a portion of the air produced, the amount of power remains constant. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 20: Surge Control
From Figure 8, when T=cold, there is sufficient rise to surge. As the ambient temperature increases to T=hot, the amount of rise to surge decreases because the discharge pressure is remaining constant and the natural curve is changing with temperature. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 21: Changes In System Discharge Pressure
Incorrect Instrumentation Output If the instrumentation, defined in Figure 4, is improperly calibrated or gives inaccurate readings, the compressor could surge even though the CMC thinks it should not. Areas of 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 22: How Is Surge Detected
Each detected surge drives a Surge Event to the Event Log. If the compressor unloads do to repeated surges, a Surge Unload Alarm Event is driven to the Event Log. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 23: Surge Indexing
MinLoad Control Setpoint is reset to the original MinLoad. Entering a non-zero number into the MinLoad Surge Index Increment variable enables surge Indexing. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 24: Oil System Control
The oil heater control does not have any interaction with the microprocessor board and is designed to operate with the control panel de-energized as long as three-phase power is available. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 25: Protection And Monitoring
The sixteen digital inputs provide status of field switches. Emergency Stop and Low Seal Air Pressure trip are standard. Any of these inputs can be configured as an alarm or trip. All inputs operate on 24 VDC power. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 26: Digital Outputs
Outputs can operate on 120 VAC, 60 Hz, single-phase power or 24 VDC power. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 27: Compressor Operating Methodology
The goal for this period is to get the compressor to rated speed and running unloaded. “Starting” is allowed for only the Start Timer period and is adjustable. This time period is 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 28: Unloaded
Stopped state. This state will remain as long as the adjustable Coast Timer is in effect. At the end of the timer, the compressor will enter either the Ready or Not Ready state. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 29: Compressor Operating States
Compressor Operating States with Valve Position System Pressure Setpoint Inlet Bypass System Pressure Valve Valve milli milli amps amps Unload Tight Closure Load Start Inlet Valve Unload Position Power Stopped Rotating 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 30: User Interface
NEMA 4 rating is maintained for the OUI. CENTAC Microcontroller ® SYSTEM INFO SETTINGS 105.3 System Inlet Pressure Valve Pressure 105.0 Bypass Setpoint Valve 173.4 Motor Current 22JUL96 12:00:00 Running Hours 11445 Loaded Load Selected Remote 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 31: Command Keys
1/4 becomes active. The current page for a folder is persistent. For example, if you begin on the SYSTEM folder page 2, change to the INFO folder and return to the SYSTEM folder, page 2 will be the page displayed. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 32: Contrast Key
Alarm, Unload Selected (the compressor will stay in “Unload” after “Starting” has been completed), and Load Selected (the compressor will go to “Minload” after “Starting” has been completed). 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 33: Edit (Setpoint Changes) Mode
Enter key again to return to Navigation mode. Navigation Mode Navigation mode is active when a folder name (SYSTEM, INFO or SETTINGS) is highlighted. When inactive, press the ENTER key to activate. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 34: System Folder
For example, if you begin on the SYSTEM folder page 2, change to the INFO folder and return to the SYSTEM folder, page 2 will be the page displayed. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... - Page 35 For example, a check mark in the “E- Loaded Load Selected Stop Pressed” boxed means that the Remote Emergency Stop push button has been System Folder - Pages 2,3: Analog/Digital Inputs 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999...
- Page 36 An Up Arrow press will display the previous seven events. Any time a Trip occurs, the system will send the display to the first seven events. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999...
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Page 37: 1X36003 Version 2.52
The Surge Sensitivity value has been edited from location x. Edit-x Starting Timer The Starting Timer value has been edited from location x. Edit-x Sys Press SP The System Pressure Setpoint value has been edited from location x. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 38: 1X36003 Version 2.52
Most electric motors are only rated for two cold starts or one hot start per hour. It is the operator’s responsibility not to exceed the electric motor’s limitation. The control system allows the compressor to be started when the compressor is ready, not the motor. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... - Page 39 Step Variable Units Value Size Value Password Digit dimensionless Date (Year) years 1990 2089 Date (Month) months Date (Day) days Time (Hour) hours Time (Minute) minutes Time (Second) seconds 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999...
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Page 40: 1X36003 Version 2.52
MinLoad Control Setpoint is the power value used to determine when the bypass valve opens. MinLoad Control Setpoint will always be equal to or greater than the Throttle Limit value. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 41: 1X36003 Version 2.52
Settings Folder Page 3 Edit Parameters Table Minimum Maximu Step Variable Units Value Size Value Each PB (Proportional Band) dimensionless 99.99 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 42: 1X36003 Version 2.52
Starting Timer is the length of time prior to enabling the loading of the compressor. Typically, this time includes the starter transition time (Y-D time). When this timer expires, the prelube pump will turn off and the compressor is enabled for loading. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 43: 1X36003 Version 2.52
Additional pages High Oil Temperature will be added as needed after this Low Oil Temperature Load Selected Loaded Remote Settings Folder - Page 6: Alarm and Trip 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 44: General Sequence Of Operation
Current amps, % MaxLoad Setpoint Amps Motor Full Load Amps MinLoad Setpoint Amps Load Stops or Trips Stops or Trips Start Unloaded Amps Zero Amp Offset Power Stopped Rotating 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 45: Indicator, Switch And Light Layout
Valve Pneumatic Tubing Block Valve Check 4-20 mA Base Valve Control Module Starter Motor Compressor Plant Air System Inlet Valve 4-20 mA Inlet Filter Figure 11: Plant Air System 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 46: Setting Maxload
On the OUI select the Settings Folder and enable manual valve control by highlighting the manual check box. NOTE When Manual is enabled, both control valves can be positioned while stopped, while only the Bypass Valve can be positioned when Loaded. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 47: Setting Minload Surge Index Increment
The machine is running unloaded. 2. Set the initial Surge Sensitivity setting to 9. a) In the Settings Folder, select the Edit Data cell for Surge Sensitivity. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 48: Tuning Stability
Tuning Stability The CMC controls stability with four Proportion Integral Derivative (PID) control loops. When the machine is running above the MinLoad point and below the MaxLoad point, pressure is 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 49: Calibrating The Control Valves
The purpose of this procedure is to position the inlet and bypass valves by opening and closing each valve from the CMC analog outputs. The valves should be adjusted to physically correspond with the valve positions displayed on the OUI. Stop the compressor. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 50: Autodual Control Settings
Discharge pressures. When the System pressure is 5% of setpoint greater than the last stage pressure as shown in the System Folder, the check valve is assumed to be closed. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 51: Unload Delay Time (Seconds)
The Reload Percent determines the System Pressure at which the machine will automatically load into the system. This value should be set according to the customer’s minimum acceptable system pressure. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 52: Setting The Start Time
Adjust the Unload Position to achieve 1 PSIG on the first stage discharge, or until a positive pressure is felt at the first stage trap bypass. If the inlet air temperature is relatively cold, increase the setting 2%, this will accommodate hot day operation. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 53: Setting Set Point Ramp Rate
The values for vibration, temperature, pressure etc. alarm and trip setpoints are located on the electrical schematic. These values determine when the controller will indicate an alarm or trip condition. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 54: Troubleshooting
OUI failed, BCM failed, UCM failed, (mass flow, system pressure, Kw, amps) are Communications failed. unstable. (Refer to Controller Problems Section) (Refer to the CMC Tuning Procedures Section) Figure 12: Troubleshooting Tree 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 55: Troubleshooting Example
When this step is performed, one of the connections is found to be intermittent. When the poor connection is corrected, the erratic reading on the OUI becomes solid. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 56: Input/Output (I/O) System
VMS #1 running) Malfunctioning transmitter VMS #2 Transmitter not calibrated VMS #2 Erratic OUI readout Loose wire/terminal/connector VMS #2, 3, 4 Incorrect OUI readout VMS #1, 2, 3, 4, 5 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 57: Checking Vibration Transmitter Power
C O M TEST NON-CONTACT VIBRATION TRANSMITTER transmitter and test. PART NO. 1X9247 S / N XXXXXX Vibration probe 20 mA = PROBE Probe extension cable INGERSOLL RAND 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 58: Check The Vibration Probe, And Cable
2. Check resistance of the probe alone, the XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX reading should be 7 to 12 ohms. Probe cable Ω mA COM V Ω Vibration probe Connect test lead to inner pin. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 59: Check The Bcm
J1-Grounded Analog Inputs, (4-20mA) Channels 3-23 Pin 25 Pin 1 4-20 mA SURCE OR 2 WIRE SIMULATOR Conversion chart mA percent Mils (from simulator) (on OUI) (from simulator) 100% 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 60: Temperature Monitoring System (Tms)
RTD internal wire fault TMS #2 Transmitter failure TMS #3 Incorrect OUI readout Transmitter not calibrated TMS #3 RTD or transmitter failure TMS #2, 3 TMS #1, 2, 3, 4 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 61: Checking For Power To The Temperature Transmitter
J2-Floating Analog Inputs, (4-20mA) Channels 1-2 J1-Grounded Analog Inputs, (4-20mA) Channels 3-23 Pin 25 Pin 1 XXXXX XXXXX XXXXX XXXXX XXXXX XXXXX 1 2 3 4 Ω Ω m A COM V Temperature transmitter 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 62: Checking For A Faulty Rtd
XXXXX XXXXX XXXXX temperature to the RTD and check the XXXXX XXXXX XXXXX ohms around the normal operating range. Ω Ω mA COM V Thermometer 32 DEGF Ice water 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 63: Degrees Fahrenheit Versus Ohms Value Chart For 100 Ohm Platinum Rtd
193.90 194.10 194.30 194.50 194.70 194.90 195.10 195.30 195.50 195.70 195.90 196.10 196.30 196.50 196.70 196.90 197.10 197.30 197.50 197.70 197.90 198.10 198.30 198.50 198.70 198.90 199.10 199.30 199.50 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 64: Degrees Celsius Versus Ohms Value Chart For 100 Ohm Platinum Rtd
196.29 196.49 196.69 196.89 197.09 197.29 197.49 260.00 197.69 197.89 198.09 198.29 198.49 198.70 198.90 199.10 199.30 199.50 NOTE: This chart converted from Fahrenheit chart using formula °C= ((°F-32)/1.8) 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 65: Checking The Rtd Transmitter
3. If the reading is not within specification, the transmitter may be faulty. J2-Floating Analog Inputs, (4-20mA) Channels 1-2 J1-Grounded Analog Inputs, (4-20mA) Channels 3-23 Pin 25 Pin 1 1 2 3 4 Temperature transmitter 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 66: Checking Proper Operation Of The Bcm And Wiring
RTD transmitter. If reading is not correct the BCM may be faulty. J2-Floating Analog Inputs, (4-20mA) Channels 1-2 J1-Grounded Analog Inputs, (4-20mA) Channels 3-23 Pin 25 Pin 1 4-20 mA SURCE OR 2 WIRE SIMULATOR 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 67: Valve Control System (Vcs)
Typical Problem Probable Cause Troubleshooting Procedure IV or BV not operating Failure of BCM VCS #1 Positioner or actuator malfunction VCS #2 Failure of I/P VCS #2 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 68: Checking Proper Operation Of The Bcm And Wiring
X X X X X X X X X X X X X X X X X X X X X X X X X Ω Ω mA COM V 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 69: Checking Proper Operation Of The I/P And Positioner
LOOP CHECK mA OUT 100% DIAL 2 WIRE 00.0% XXXXXX MODEL CL-XXX INGERSOLL-RAND 00.0% - 100% Centrifugal Compressor Division Highway 45 South Mayfield, KY. 42066 Parts Service (800) 247-8640 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 70: Pressure Monitoring System (Pms)
PMS #1, 2 disconnected Loss of power to transmitter PMS #1 Malfunctioning transmitter PMS #3, 4 Erratic OUI readout Loose wire/terminal/connector PMS #1,2 Incorrect OUI readout PMS #1, 2, 3, 4 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 71: Checking For Power To The Pressure Transmitter
X X X X X X X X X X X X X X X X X X X X SPAN ® Ω INGERSOLL RAND Ω mA COM V 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 72: Checking Proper Operation Of The Bcm And Wiring
PT. If the reading is not correct the BCM may be faulty. J2-Floating Analog Inputs, (4-20mA) Channels 1-2 J1-Grounded Analog Inputs, (4-20mA) Channels 3-23 Pin 25 Pin 1 4-20 mA SURCE OR 2 WIRE SIMULATOR 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 73: Quick Check Of The Pt
2. Remove the PT and connect a regulated air supply to the pressure connection. Power up the CMC and vary the regulated air supply. The OUI should read the pressure being applied. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 74: Digital Input System (Dis)
The following table identifies typical problems, probable causes, and appropriate procedures for verifying the probable cause: Typical Problem Probable Cause Troubleshooting Procedure False alarm or trip Faulty device DIS #1 Faulty wiring DIS #1 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 75: Checking Proper Operation Of The Digital Devices
Pin 1 J4-Digital (Discrete) Inputs (24 VDC), XXXXX XXXXX XXXXX Channels 1-8 XXXXX XXXXX XXXXX Pin 1 Ω Ω Seal Air Switch mA COM V J3-Analog Outputs (4-20mA) Channels 1-4 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 76: Control Power System (Cps)
J4 & J5 - Digital Input Power 24 VDC (pin 1) Analog Input/Output Power LEGEND: Trace Wire J1- Analog Input Power 24 VDC (pin 26) J3- Analog Output Power 24 VDC (pins 2 & 8) 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 77: No Ac Power
3. Restore control power, the meter should read 120 VAC or 220 VAC depending upon the rated supply power. The rated supply power can be verified from the electrical schematic. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 78: No Dc Power
3. Restore control power, the meter should read approximately 24 VDC. If approximately 24 VDC is not present, check F101 on the BCM, if F101 is good, check for DC power. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 79: No Cpu Power
3. Check F100, if F100 is blown the BCM must be replaced, not the fuse. 4. If F100 is not blown, and the BCM is not functioning, the BCM must be replaced. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 80: Controller Problems
All components require 24 VDC and rely on hardware and software to perform correctly, if the problem cannot be isolated to a power problem it is most likely a hardware or software problem, which will require Ingersoll-Rand support to correct. Component Specification: •... -
Page 81: Bcm Problems
1. Check for OUI power as described in the section titled “The Control Power System”. If approximately 24 VDC is present the OUI may be faulty. OUI displays “INGERSOLL-RAND Centrifugal Compressor Division” CMCS 1. Check the cabling between OUI J1 and BCM J6. -
Page 82: Options
Also an optional enclosure type that should be applied in the same type of NEMA 4 applications within corrosive environments. The basic difference between NEMA 4 and NEMA 4X is that the panel enclosure is constructed with stainless steel. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 83: Space Heater
Pricing varies depending upon the size, amp rating of the fuse, which is required for protection. NOTE This option does not make fuse size provisions for the main motor starter. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 84: Control Electrical Package
Power Regulating Constant Voltage Transformer If the electrical power supplied to the CMC varies more than ten percent, this transformer must be added to bring the voltage within the specification requirements. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 85: Automatic Starting
DISABLED/ENABLED selector switch must be in the ENABLED position and all permissive functions satisfied in order for the start-up to proceed. Solenoid water valve(s) are provided for the intercooler(s) to reduce water consumption when the compressor is not running. A 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 86: Auto-Cold Start
This speed is determined by adding an offset to the low speed alarm. This offset is the speed that the governor can accurately control. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 87: Surge Control
The bearing design requires a minimum speed to form the oil film thickness required for proper bearing 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 88: Accelerate-2
The low trip speed was not achieved before the end of the Starting Timer. TTV Switch Fault The trip and throttle valve (TTV) limit switch is made when the (TTV) solenoid is de- energized. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 89: Settings Folder
4. “Surge Index Increment, amps” is replaced with “Surge Index Increment, IV Pos %”. For Page 5, Miscellaneous 1. “CT Ratio” is removed. 2. “Motor Failure Trip Enable” checkbox is removed. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 90: General Sequence Of Operation
(Driver Speed Rated/Idle) in the CMC and is sent on the discrete output (Driver Speed Rated/Idle) to the governor. 3. When the two-minute waiting timer has expired, the compressor is NOT READY. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 91: 1X36003 Version 2.52
The compressor bearings are designed to have a minimum oil film pressure created by a minimum rotating pinion speed. Therefore, we must not stay at 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 92: 1X36003 Version 2.52
Driver Speed Rated/Idle Switch Electronic on Panel Governor Door Analog Input (AI) Speed Speed Turbine Compressor TTV Solenoid Manual Latch Limit Switch Steam Trip Valve Throttle Valve Solenoid Steam Valve 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 93: Diesel Driven Compressors
2. “Start – Momentary”, “Stop – Momentary” and “Reset – Momentary” discrete outputs are eliminated. 3. “Driver Permissive” discrete output is wired to the “Trip and Throttle Valve Limit Switch” discrete input. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 94: Communication
Since the customer writes this interface, the system can be as flexible as the customer desires. Centac Energy Master (CEM) CEM is a pre-written, software package available for compressors with CMC panels. This... -
Page 95: The Cmc-Modbus Interface
Introduction The CMC can communicate with other devices over a variety of communications standards. Supported standards, or protocols, include RS-232, IRBUS (Ingersoll-Rand Proprietary), and Modicon’s MODBUS. The built-in ports on the CMC’s optional Universal Communication Adapters access communications. The CMC-MODBUS Interface defines the message structure that a CMC uses to exist on a MODBUS network. -
Page 96: Modbus Messages
This address must be unique in the MODBUS network. The valid range for this address is 01-FF (hexadecimal). NOTE: 00 (hexadecimal) is reserved for broadcast. Configuration of the slave address is available through the Ingersoll-Rand Service Tool and will be provided by a certified Ingersoll-Rand Service Representative. -
Page 97: Single Module Addresses
1, the discrete output is on. If the function returns a 0, the discrete output is off. Broadcast is not supported. Refer to the table on the next page for MODBUS Absolute Addresses for each coil supported by the CMC-MODBUS Interface. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 98: Example: Reading A Single Coil
The response from this command is: Device Function Byte Address Code Count Data The data (01) means that the discrete output is on, or the prelube pump is running. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 99: Example: Reading Multiple Coils
(Digital) Inputs. If the function returns a 1, the input is on. If the function returns a 0, the input is off. Broadcast is not supported. Refer to the table on the next page for MODBUS Absolute Addresses for each discrete input supported by the CMC-MODBUS Interface. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 100: Example: Read Single Discrete Input
The data (01) means that the input is on, or the emergency stop push button is pressed. Example: Read Multiple Discrete Inputs The method for reading multiple Discrete Inputs is the same as reading multiple coils. See the example for “Reading Multiple Coils”. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 101: Function 03 - Read Holding Registers
Refer to the table below for MODBUS Absolute Addresses for each Holding Register supported by the CMC-MODBUS Interface. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 102: 1X36003 Version 2.52
Analog Input, Channel 11 (J1-P17) - High Alarm Setpoint 40143 00-8E 40144 00-8F 43143 0C-46 Analog Input, Channel 11 (J1-P17) - Low Alarm Setpoint 40145 00-90 40146 00-91 43145 0C-48 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 103: 1X36003 Version 2.52
Analog Input, Channel 13 (J1-P21) - Low Alarm Setpoint 40161 00-A0 40162 00-A1 43161 0C-58 Analog Input, Channel 13 (J1-P21) - Low Trip Setpoint 40163 00-A2 40164 00-A3 43163 0C-5A 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 104: 1X36003 Version 2.52
0C-CA Autodual Unload Point 40277 01-14 40278 01-15 43277 0C-CC Autodual Unload Timer 40279 01-16 40280 01-17 43279 0C-CE Pressure Setpoint Ramp Rate 40281 01-18 40282 01-19 43281 0C-D0 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 105: 1X36003 Version 2.52
40298 01-29 43297 0C-E0 Running Hours 40299 01-2A 40300 01-2B 43299 0C-E2 Loaded Hours 40301 01-2C 40302 01-2D 43301 0C-E4 Number of Starts 40303 01-2E 40304 01-2F 43303 0C-E6 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 106: Example: See Example For Function 04
For those who would like to only get the 16-bit integer value, this will work well for most inputs; however, the CMC has some inputs, like vibration, that are typically less than one. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 107: Example: Read Single Channel 16-Bit Integer And Fraction
(the following data are presented in hexadecimal format): Number of Device Function Address Registers Address Code The response from this command is: Data Device Function Byte Reg-1 Reg-2 Address Code Count 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 108: Example: Read Single Channel Ieee 32-Bit Floating Point Number
15 14 13 12 11 10 exponent mantissa sign Convert hexadecimal registers 1 and 2 (Reg-1, Reg-2) into decimal values ... Register Byte Symbol Decimal R1HB R1LB R2HB R2LB 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 109: Example: Read Multiple Channels
This function will override the CMC’s current state. The forced state will remain valid until the CMC next solves the coil. The coil will remain forced if it is not programmed in the CMC logic. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 110: Example: Forcing A Coil
Refer to the table for the Holding Register list for the MODBUS Absolute Addresses supported by the CMC-MODBUS Interface. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 111: Example: Presetting A Single Register (16-Bit) Integer
Forces each coil (MODBUS 0x reference) in a series of contiguous coils to either ON or OFF. When broadcast, the function forces the same coil references in all attached slaves 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 112: Example: Forcing Multiple Coils
Function 16 (10 Hex) - Preset Multiple Registers Presets values into a sequence of contiguous holding registers (MODBUS 4x references). When broadcast, the function presets the same register references in all attached slaves 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 113: Example: Presetting Holding Registers For 32-Bit Values
1. Since this is a positive number, the first bit is 0. 52.70000 26.350000 2. Determine the exponent bits by ... 26.35000 13.175000 13.17500 6.587500 6.58750 3.293750 3.29375 1.646875 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 114: 1X36003 Version 2.52
16 bit integer and 16 bit fraction will satisfy most requirements. Some systems have 32 bit capability built directly into their products. We have provided this feature for those systems. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 115: Example: Presetting A 16-Bit Integer And 16-Bit Fraction Holding Register
The exception response message has two fields that differentiate it from a normal response: 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 116: Function Code Field
For an exception response, the UCM returns an exception code in the data field. This defines the UCM’s condition that caused the exception. Exception Codes Supported by the CMC Microcontroller 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 117: Maximum Query / Response Parameters
Read Holding Registers 64 registers Read Input Registers 64 registers Force Single Coil 1 coil Preset Single Register 1 register Force Multiple Coils 512 coils Preset Multiple 64 registers Registers 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 118: Cmc Data
MODBUS communications is 110 psi. Communication Parameters Configuration of the communication speed (baud rate), parity, number of data bits and number of stop bits is available through the Ingersoll-Rand Service Tool and will be provided by a certified Ingersoll-Rand Service Representative. 1X36003 Version 2.52 ©... -
Page 119: The Cmc-Df1 Interface
The CMC Microcontroller can communicate with other devices over a variety of communication standards. Supported standards, or protocols, include RS-232, IRBUS (Ingersoll-Rand Proprietary), Modicon’s MODBUS, and Allen-Bradley DF1. The built-in ports of the CMC’s Universal Communication Module access communications. This UCM-DF1 Interface defines the message structure that a CMC Microcontroller uses to exist on a DH+ network. -
Page 120: Full-Duplex Protocol
Abbreviation Hexadecimal Value DF1 Device Address Configuration of the DF1 device address is available through the Ingersoll-Rand UCM- Wizard Tool and will be configured by a certified Ingersoll-Rand Service Representative. CAUTION The UCM must be configured to have the same node address as 1770-KF2 interface module. -
Page 121: Source (Src) Byte
CRC field for error checking. These bytes allow you to verify the accuracy of each message frame transmission. SW-1 of 1770-KF2 module allows you to select BCC or CRC error 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 122: Bcc (One Byte)
CMC TECHNICAL REFERENCE MANUAL checking for the command messages sent to CMC. The Ingersoll-Rand UCM-wizard software allows you to configure BCC or CRC error checking for the UCM-DF1 driver, which needs to be the same error checking method as 1770-KF2. -
Page 123: Data Addressing
The PLC5 Typed Read commands for requesting data in integer or float format is exactly the same messages. The UCM-DF1 driver cannot tell the requested data type from the command bytes received. Therefore, the returned data type has to be pre-configured in 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 124: Cmc As Slc5/04
CMC TECHNICAL REFERENCE MANUAL UCM via the Ingersoll-Rand UCM-wizard tool. Default is the integer type. If a PLC5 or SLC5/04 issues the command, the local data file used to store the gathered data should be the same type. Otherwise, you get erroneous data or an error status code due to data type mismatch. -
Page 125: Cmc Data Addressing
Analog Input, Ch 3 (J1-P1) – Hi Alarm Setpoint Analog Input, Ch 13 (J1-P21) - Lo Alarm Setpoint Analog Input, Ch 3 (J1-P1) – Lo Alarm Setpoint Analog Input, Ch 13 (J1-P21) - Lo Trip Setpoint 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 126: 1X36003 Version 2.52
CMC TECHNICAL REFERENCE MANUAL Analog Input, Ch 3 (J1-P1) – Lo Trip Setpoint Analog Input, Ch 14 (J1-P24) - Hi Trip Setpoint 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 127: 1X36003 Version 2.52
Digital Output, Ch 1 (J15-P7,8) Reserved Digital Output, Ch 2 (J15-P5,6) Reserved Digital Output, Ch 3 (J15-P3,4) Reserved Digital Output, Ch 4 (J15-P1,2) Surge Pressure Rate Digital Output, Ch 5 (J14-P7,8) 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 128: 1X36003 Version 2.52
Digital Output, Ch 12 (J13-P1,2) Autodual Unload Timer Digital Output, Ch 13 (J12-P7,8) Pressure Setpoint Ramp Rate Digital Output, Ch 14 (J12-P5,6) Inlet Valve Unload Position Digital Output, Ch 15 (J12-P3,4) 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 129: Supported Functions
03h. The UCM should be configured to represent data type as desired. Following is a table illustrating how the PLC5 system address is mapped to the CMC data table address. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 130: As 16-Bit Integer And Fraction
ID value in bits 4, 5, and 6. These additional ID bytes follow directly after the flag byte. In the above response message, the additional one byte is 09h, which means array of similar elements. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 131: As Ieee 32-Bit Floating Point Number
After the proper byte swapping, the system pressure (42-DC-D4-C6), expressed as a floating point number is 110.4155731201 PSIG. IEEE floating-point numbers are represented in 32 bits as shown below. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 132: Example: Read Multiple Analog Channels
16 data at a time, because IRBUS can handle at most 16 data in one query for the time being. NOTE You must read a contiguous group of data (channels) for a single command. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 133: Example: Reading A Discrete Value
1-6. You can determine the remote trouble contact (Channel 3, J15-P3,4) by bit 12 in the returned integer. The table below graphically depicts the individual bit value for the returned two-byte integer. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 134: Command 0F/Function 67 - Plc5 Typed Write
2. Divide the decimal value by 2 until the result is less than 2, but greater than 1. Count the number of iterations required. Add 127 to the number of iterations. This result is the exponent. Convert this result to binary. These are the next eight bits. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 135: 1X36003 Version 2.52
* 2 = * 2 = - 1 * 2 = - 1 * 2 = * 2 = From the table above, 10100101100110011001100 represent the next 23 bits. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 136: Example: Presetting A 16-Bit Integer And 16-Bit Fraction Analog Setpoint
For the CMC, forcing the above listed coils OFF is not meaningful because the default state of each of the above coils is OFF. When using these commands, they should be sent once (momentary) and the CMC will execute the commands. NOTE 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 137: 1X36003 Version 2.52
This function will override the CMC’s current state. The forced state will remain valid until the CMC next solves the coil. The coil will remain forced if it is not programmed in the controller's logic. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 138: Example: Forcing Multiple Coils
CMC next solves the coil. The coil will remain forced if it is not programmed in the controller's logic. To force a reset (CMC data table address, DDh) and start (CMC data table address, E0h) of the compressor the following command is sent: 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 139: Command 0F/Function A2 - Slc Typed Logical Read
The four bytes in data field of the response message is converted to a floating point number, 105.4 PSIG. To read the pressure setpoint value as integer, the following command is sent: SRC CMD STS Byte File File S/Ele DLE ETX Size Type 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 140: Example: Reading Multiple Analog Values
Note that the file number must be 10. The local data file used to store the returned data can be either bit (85h) or integer (89h) type. The response from this command is: Data 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 141: Command 0F/Function Aa - Slc Typed Logical Write
To remotely acknowledge the compressor’s alarm or trip condition, the following command is issued: SRC CMD STS Byte File File S/Ele Data ETX BCC Size Type The response from this command is: 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 142: Example: Forcing Multiple Coils
8 integer elements, which is 16-byte long. Allen-Bradley SLC 504 Example Data Files RSLogix 500 Ladder Diagram The following ladder logic example is the fastest and most reliable method for gathering data from a CMC. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 143: Ucm Sts Error Codes
Cannot form CMC data table query/set list NOTE The UCM-DF1 driver does not support EXT STS. According to Allen-Bradley DF1 protocol convention, EXT STS is part of the message only if STS = F0h. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 144: Communication Parameters
Communication Parameters Configuration of the UCM RS-422 port’s communication speed (baud rate), parity, number of data bits, number of stop bits... is available through the Ingersoll-Rand UCM-Wizard Tool and will be configured by a certified Ingersoll-Rand Service Representative. The settings should be the same as the 1770-KF2 interface module. -
Page 145: 1X36003 Version 2.52
Modbus Network #1 Full or Half Duplex RS-422 or RS-485 To DH+ Universal Network Comm. Allen-Bradley IRBUS Module 1770-KF2 Address: 6 (UCM) Interface Module DF1 Network Full Duplex RS-422A 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 146: 1770-Kf2 Setup
Full Duplex None Full Duplex Even Full Duplex None Full Duplex Even Full Duplex None CAUTION Only the UCM-DF1 driver supports the full duplex options. Half duplex is not supported. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 147: Node Address)
Execute received diagnostic commands Pass any received diagnostic commands to the attached asynchronous device The available baud rate settings are shown below: Baud Rate SW-6 Setting (Bits per second) 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 148: Network Link Selection)
The UCM-DF1 interface uses RS-422 communication. SW-8 should select RS422. Communicatio SW-8 Setting Type RS-232C RS-422A Wiring Diagram for RS-422A 1770 KF2 Module RS-422 RS-422 Cable not to exceed 4000 feet 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 149: 1X36003 Version 2.52
CMC TECHNICAL REFERENCE MANUAL 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 150: Documentation
These codes, except Status 00h and 05h, are shown on a blank screen in the upper left hand corner of the Operator User Interface (OUI). Since Status 00h and 05h are normal operating conditions, these codes are not displayed. When a code is displayed, contact your local Ingersoll-Rand Service Representative. Status Code... -
Page 151: 1X36003 Version 2.52
Power supply voltage (+24 VDC) dropped below minimum operating level. Check power supply. Cycle power when voltage is within proper operating limits. Once restarted, the program will operate properly until the same condition reoccurs. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 152: 1X36003 Version 2.52
Interpolation System Error An error has occurred in the interpolation block. The module must be reprogrammed. Calibration System Error Occurs during initialization of the EEPROM block. The module must be reprogrammed. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 153: Base Control Module (Bcm)
J3-Analog Outputs (4-20mA) Channels 1-4 Pin 25 Pin 7 Pin 5 Pin 1 Pin 1 J1-Grounded Analog Inputs, Pin 1 (4-20mA) Channels 3-23 J2-Floating Analog Inputs, (4-20mA) Channels 1-2 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 154: Connector Description
NEMA enclosure. Place external tooth lock washer between this module and the ground strap. 4. “na” is defined as “not applicable”. 5. All Phoenix connectors may be replaced with an equal supplier. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 155: Connector Input And Output (I/O)
Shield, Channel 1 Data Link 1- Digital Output Channel 1 Analog Input Channel 2+ Data Link Ground Power 24 VDC, Channel 2 Analog Input Channel 2- Shield, Channel 2 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 156: Operator User Interface Module (Oui)
J1-RS232 Port J2-Input Power No Connection +12 To +24 VDC (VPOWER) Transmit (TX) Ground (GND) Receive (RX) No Connection Signal Common No Connection No Connection No Connection No Connection 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 157: Cmc User Interface/Bezel Cleaning Instructions
Dampen a soft cloth or paper towel with water and wipe any remaining cleaner from the surfaces. Ingersoll-Rand Company recommends the following for cleaning the OUI and bezel: Cleaners: Water or mild house hold cleaner, no petroleum or acetone based fluids. -
Page 158: 1X36003 Version 2.52
The backlight is part of a larger panel Use circular stand-offs to that is removed as an assembly. rest screwdriver shaft against while prying backlight panel out. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 159: 1X36003 Version 2.52
Route wiring, replace nylon cable retainers, insert backlight plug, replace main cover and connect power and communication cable to complete installation. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 160: Universal Communication Module (Ucm) Optional
Pin 1 Pin 1 Top View Switch A0 IRBUS Address Switch A1 Unused Switch (Must be set to 0) RS232 Activity IRBUS RS485 Indicator Activity Indicator RS422/485 Activity Indicator 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 161: Connector Description
The UCM has three light emitting diodes (LEDs) to indicate the activity of the RS232, RS422/485 and the IRBUS RS485 ports. The following table indicates the different states of these ports. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 162: Ucm Communications Parameters
1, 1.5, 2 Configurable Yes* * A certified Ingersoll-Rand Service Representative will provide this configuration. UCM Timeout The UCM has three communication ports, RS232, RS422/485 and IRBUS RS485. Each of these ports has its own communication parameters that it supports. -
Page 163: Rs422/485 Network Wiring Diagram - Full Duplex
Set switch A0: 0-F Set switch A1: 0 Set switch A1: 0 Modbus Address - 01 Modbus Address - 02 (Set through software) (Set through software) Compressor Panel #1 Compressor Panel #2 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 164: Rs422 Network Wiring Diagram - Half Duplex
Set switch A0: 0-F Set switch A1: 0 Set switch A1: 0 Modbus Address - 01 Modbus Address - 02 (Set through software) (Set through software) Compressor Panel #1 Compressor Panel #2 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 165: Terminating Resistor
24 VDC Power RS232 Base Control Module (BCM) #1 24 VDC 120/240 VAC Power Universal Communications Module (UCM) Base Control Module Power Supply (BCM) #2 24 VDC 24 VDC Optional Equipment 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 166: Network Diagram
To next CMC Panel C o m m . or any other IRBUS Module Modbus compliant Address: 6 Modbus Network #2 (UCM) product Full or Half Duplex RS-422 or RS-485 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 167: Technical Specification
Wiring Harness Trip Function One wiring harness per device Low seal air (interlocked w/ prelube pump operation) NEMA 4 rated Display Functions (Read Only) Motor current System air pressure 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 168: 1X36003 Version 2.52
Remote 4-20 for Pressure Setpoint Differential pressure switch set at 0.2 inches (5 mm) of water Running Unloaded Contact Loss of purge indication, Relief valve, Warning label Centac Energy Master (CEM) Fused Control Power Disconnect Rotary handle through door, 30 amp fuse Features... -
Page 169: Glossary
1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 170: Ingersoll-Rand Company Date Of Issue: 18-Oct
(setpoint pressure minus stressed electric circuit. system pressure). CMC — Centac MicroController. Derivative Constant — Also know as the rate time, in CMC System — Any combination of CMC control units of seconds. -
Page 171: 1X36003 Version 2.52
(even parity) or odd (odd parity). This is used The test passes if the signals are identical. to detect errors in communication transmission. Partial Unload — See Surge Absorber. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 172: 1X36003 Version 2.52
Start button and the compressor is running at beyond RS-232. This standard is a balanced voltage system full speed. The timer is used to transition wye delta with a high level of noise immunity. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 173: 1X36003 Version 2.52
UCM — Universal Communications Module. The device that Throttle Limit — See TL. allows outside systems to communicate with the CMC. UL — Underwriter’s Laboratory. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 174: 1X36003 Version 2.52
A relief valve is installed to prevent over-pressurization and a warning label, text below, is affixed to the front of the panel. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 175: Service Tool Variable Names
Autodual is active. controller. This is the value of an analog output. ASF — Adjusted Service Factor. The Ingersoll-Rand supplied Bypass_Valve_Manl — Bypass Valve Manual. The value for determining MaxLoad. -
Page 176: 1X36003 Version 2.52
This is used to prevent starters, inhibit loading, de-energize the prelube pump, and system pressure overshoot when loading the compressor. disable the alternate alarm and trip setpoints. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999... -
Page 177: 1X36003 Version 2.52
Autodual is active. User_PSP — User Pressure Set Point. The local control pressure set point. Wait_Timer — The delay interval, in seconds, between power up and the ready state. 1X36003 Version 2.52 © 1996-1999 Ingersoll-Rand Company Date of Issue: 18-Oct-1999...
Need help?
Do you have a question about the CENTAC and is the answer not in the manual?
Questions and answers
Bad vibration in air inlet duct reasons
Bad vibration in the air inlet duct of an Ingersoll-Rand CENTAC can be caused by:
1. Induced vibration from the driver – The driver may be causing excessive vibration that affects the air inlet duct.
2. Unbalanced motor rotor – An imbalance in the motor rotor can generate vibrations that transfer to the duct system.
To correct these issues, the motor rotor should be balanced, and the source of the induced vibration from the driver should be addressed.
This answer is automatically generated